A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
From: Peter Hakel
Date: 2015 Dec 23, 19:38 -0800
In 2015 “an anonymous benevolent user” of the original Navigation Spreadsheets combined several of them into a single unit to provide a much more user friendly interface and functionality. The result (named "Astron" - see attachments) is hereby released with its creator's consent.
During this development process a small error (less than 1’) in the GHA calculation was discovered and corrected in all original almanac spreadsheets. We therefore recommend downloading the latest version of the suite; in particular, the spreadsheets: aries_stars, sun, mercury, venus, moon, mars, jupiter, saturn, uranus, neptune, what_star, polaris, polaris_lha.
and links therein.